Power-operated printing machine



Aug. 9, 1949. L. B. HILL POWER-OPERATED PRINTING MACHINE Filed April 14,1945 6 Sheets-Sheet l Laurence BJ/z'll NVENTOR ATTORNEY w wm Aug. 9,1949. L. HILL 2,478,630

POWER OPERATED PRINTING MACHINE Filed April 14, 1945 -6 Sheets-Sheet 2Laure/ice 3.17 17! g INVENTOR ATTORNEY Aug. 9, 1949. v B. HILL POWEROPERATED PRINTING MACHINE 6 Sheets-Sheet 5 Filed April 14, 1946Laure/wee 5. Hill INVENTOR ATTORNEY Aug, 9, 1949. L. B. HILL POWER,OPERATED PRINTING MACHINE 6 Sheets-Sheet 4 Filed April 14, 1945ATTORNEY M a a o Filed April 14, 1945 6 Sheets-Sheet 5 Aug. 9, 1949. I L5, HM; 2,478,630

POWER OPERATED PRINTING MACHINE IIIIIIIIIII laurel: ce Z. Hill ATTORNEYAug. 9, 191 9a L 2,478,630

POWER OPERATED PRINTING MACHINE Filed April 14, 1945 6 Sheets-Sheet 6 lalaurence .BJz'ill ATTORNEY Patented Aug. 9, 1949 POWER-OPERATED PRINTINGLaurence B. Hill, Syracuse, N. Y., assignor to L. C. Smith & CoronaTypewriters; Inc., Syracuse, N. Y., a corporation of New YorkApplication April 14, 1945, Serial No. 588,351

7 Claims. (01. on-17 l The invention relates toimprovements in poweroperated printingmaohines, the general purpose of the invention-being toprovide an improved power mechanism for actuating one or more elementsof such printing; machines as typewriting machines, listing or printingcalculating machines,-and the like. Such printing machines commonly;include provisions -ior facilitating the printing of matter in tabularform, and a further purpose of the invention is to provide improvedpower actuated tabulating' means suitable for such machines. y l tAnother purpose ofthe invention is to provide an.improved;key-controlled power mechanism for actuating an"operationeffecting e m nt f the machine in response to opposite strokes of thecontrol key; J :Hji V: i V y A Another purpose of the invention is toprovide an improved powermechanismwherein actuationof each of aplurality oifoperation efiecting elements bya common power drivenactuator is effected, I 1: :1 'i :i' 4;;

.,Another, purpose of the invention is to provide a'simple andeflicientpower mechanism for moving an operation eiiecting element ineither of two opposite directions from a normal position and restoringsaid element to normal position. I

Other purposesandadvantages of the invention will appear from thefollowing description of:.the embodiment of the invention in atabulating mechanism for a typewriting machine shown in the accompanyingdrawings.

In the drawings: 7 y 7 a I Figure 1 is a fragmentary top plan view of atypewriting machine in-normal idle condition equipped with theimproved'power mechanism, certain parts being broken away and othersomitted for clarity of illustration of features of the power mechanism,and only so much of the known features of the machine being shown as isrequired for a clear understanding of the improvements; i

Figure 2 is a fragmentary front elevation of the power mechanism in itsnormal idle condition with certain elements omitted and others brokenaway for clarity of illustration of features of the mechanism; i

Figure 3 is a vertical sectional view on the line 3+3 of Figure '1, withthe parts in normal idle condition;

Figures 4, 5 and 6 are detail vertical sectional views on the line 4+4of Figure 2 showing certain parts of the mechanism in different stagesof activation thereof;

Figure 7 is a detail sectional view similarto Figure 3, but showing oneof the frame-carried tabulator stops being held in its set or activepositiomn v, a r 1 I Figure 8 ma detail sectional view onthe line 8-8 ofFigure 9, showing the carriage braking means in active condition; J I fp Figure 9 is a' detail sectional view on the line 3-9 of Figure 10;

Figure 10 is aview similar to Figure 8, showing the carriage brakingmeans in its normal inactive condition; x

Figures 11 and 12 are detail views taken o'n the line 3-3 of Figure 1,showing respectively innormal and fully shifted positions, and on anenlarged scale, one of the set of peration effecting elements and itsasso'ciatedinterponent which are operative by the rotati'veactuatortoselectively actuate the frame-carried tabulator stops;

Figure 13 is a sectionalview'on line l3|3 of Fi re t Figure 14 is adetail se' uonal viewon line 4 l 4 of Figure 1, showing the'settingandunsetting means for the carriage-carried tabulator stops in normalpositionwith one of the stops unset .to its inactive position; f p

Figures 15 and 16 are views similar to Figure 14, showing successivestages of the operation of the mechanism to set acarriage-carried stopin its active position of Figures 7, 15 and 17;

Figure 17 is a detail sectional view on line I 'I-l 1 of Figure 1,showing the setting and unsetting means for the carriage-carriedtabulator stops in normal position with one of the stops set in itsactive position; and U .7

Figures 18 and 19 are views similar to Figure 17 showing successivestages of the operation of the mechanism to unset a carriage-carriedstop to its inactive position of Figures 2, 3; Hand 19' The knownfeatures of themachine will first be described. Thestationary frameworkor main frame designated as a whole by the numeral l0 supports theworking parts of the machine. The usual roller platen II is journaled inthe platen carriage l2 which is mounted as usual on the frame to travelback and forth transversely of the machine. The carriage is urged fromright to left by the usual motor spring I3 attached at one end to .andwound about a stationary stu-b shaft l4- held to the framework, theother end of the spring being attached to the spring-driven drum I5. Thedraw band I6 is wound about the drum, and is attached at one end to thedrum and at the other end to the carriage to constantly exert a-pulltoward the left on the-carriage. The hub Ifia of the drumis confinedbetween an external letter space the carriage when-the rocker 22isactuated by known means not shown. Dog 23 is normally engaged with wheellfi'and is movable relatively to the rocker 22 to free thecarriagefromcontrol of the dogs for running orjumping tabulatingmovement of the carriage from rightto left.- To move the dog 23relatively to the rocker to release the carriage for tabulatingmovement, there is provided the known bellcrank lever 25 pivotedonframework Ill, at 25a, with onearm of the lever overhanging the dog 23in'the normal position of the dogrockenand with the other arm of thelever connected by thelink 26 with' an arm 21 which is adjustably heldby known'means to rock in unison with'an' escapement release bail; Theknown bail has" its side arms 28 pivoted at 29-29 on the frame to swingfore andaft of the machine and is located substantially medially of theright and left hand sides of the machine; The side arms of the bailareconnected at their lower ends by a cross bar. 30'and are alsoc'onnectedadjacent their upper ends by a stiffening or reinforcing bar3|. I V

Ten fore and aft slidable decimal tabulator stops 32 (only some of"which are'shown) are mounted on the framework l0 adjacent therear of themachine substantially medially of thesides of the machine andarearranged'side by side as usual for arresting the carriage at eitherof ten immediately successive letter: space positions depending uponwhich one of said steps is projected to active position. ,Stop's32iarereciprocalsubstantially fore and aft of the machine in ten slots33a formed in a block 33 forming part ofxthe stationary framework of themachine, the stops being held up in thejslots by a r'etainiiig bar 34held to block-33. Theseistop s; as will appear hereinafter, serve ascounterstops for carriage: carried stops 4| later described;

Ten upstanding operating levers 35 are provided for sliding the stops 32 totheir inactive and active positions, each lever 35 being positivelyconnected with a different stop, and the levers beingrguided in a combI54 fixed tojframework H]. The stops in their'inactive positions abut,as shown, at their rear ends, apart of framework It which serves tolimit retraction of the stops: Each lever-35 has a rounded upperend'portion 35a rockably seated in a notch 32a in its associated stop,portions 3511 being guided in th'e slots 33a in block 33, and allof thelevers 35' being'loosely pivoted intermediatetheir ends" on'a horizontalpivot rod 31' fixed to framework It, and extending transversely of themachine. fi'p rings 38 are connected to the levers 35 and to frameworkIII to constantly urge the upper arms of the levers toward the rear ofthe machine and to normally yieldingly hold the stops 32'; retracted toinactive position. A spring 39 i eqnneeted with framework I0 and witharm 2'l to normally yielding ly hold the cross-bar 30 of the bail283fl-3| against the rearedgesof levers 35 adjacent the lower ends ofthe levers. and to yieldingly hold the bellcrank lever 25 slightly outofcbntact'with 4 escapement dog 23. A light torsion spring 48 is connectedwith the framework I0 and bellcrank lever 25 to assist in restoring saidlever to and holding it in its normal inactive position.

When either of the levers 35 is rocked in opposition to the pull of itsreturn spring to project its associatedrstop 32 from inactive to activeposition, the bail-will be rocked to actuate the bellcrank lever 25'tomove'e'scapem'ent dog 23 out of engagement with escapement wheel I9 andthereby free the carriage for a running or jumping movementth'ereof tothe left under the pull of motor spring |3.,

A set of carriage-carried tabulator stops 4| (only some of which areshown) are provided for coaction with the frame-carried counterstops 32to arrest tabulating travel of the carriage, there being one of thestops 4| for each letter-spaced printing position of the carriage. Atabulator stop carrying bar 42 is held to the carriage and extendstransversely of themachine- Stops 4| are pivoted at one end on a rod 43extending across guide slots 42a-in thefr'ont' edge o'f-b'a'r 42;

and the other ends of the stop's extend through guideslots 42b in therear edge of bar 42. Each stop 4! has'a projection 44 for arrestingupward swinging of the stop when the stop reaches an inactive position,and'a projection 45 for arresting down-ward swinging of the s'topwhenthe stop reaches its active position. Each stop 4| has a rearwardlyprojecting nose or-lug 46 affording an abutment for engagement with theright hand side of a projected counterstop 32 to arrest the carriage ifsaid stop 4|"i's' set inactive position; Lugs 46 of stops4| will-passany retracted counterstop'32 in both the active" and inactive positionsof the stops 4| and will pass any projected stop 32in the inac'tivepositio'n of stops 4 E'ach stop 4| has two small notches 41 and 48 forcoaction with therear e'dge'of'a thin bar 49 (held to the stop bar 42)to yieldin'gly latch the stop in inactive and active positionsrespectively, each said stop being slightly resilient to permitspreading of its ends apart when the stop is forcibly rocked about thepivot rod. Each stop 4| has a second rearwardly projecting nose or lug50 above lug 46.

As is usual in machines having two sets of tabulating steps such asabove described, each of the carriage-carried tabulating stops 4| isleft set or releasably latched in either its active or inactivepositions, one or more of the stops 4| being left in active position forthe printing of a particular tabulararrangementof matter and theremaining ones being left in inactive position. For selectivepositioning of the stops 4| in any desired grouping of actively andinactively positioned stops, there is provided the known stop positionchanger or shifter which comprises a yoke 5| pivoted at 52 on theframework ID for rocking thereof about a horizontal axis extendingtransversely of the machine, said yoke having a forwardly projectingstop-shifting finger or proiecmon 53 located substantially medially ofthe sides; of the machine and of such width transversely of the machinethat in each letter spaced position of the carriage, said finger isinterposed between the two projections 46 and 50 of a different one ofthe stops 4|. The stop shifter iii-53 is shiftable in oppositedirections from a normal intermediate" position to shift a stop 4|registered therewith either to inactive. or to active position and toreturn to the normal position of the shifter and leave the shifted stopin its shifted position.

The foregoing described: parts of the machine are known. Theimprovements whereby the escapement release means the stops 32 and thestop shifter i53 for stops ll are moved by mechanical power :will now bedescribed, and

there will also be described an' improved braking means for retarding orcontrolling tabular movements of the carriage and improved v meanswhereby said braking means .are' applied and released by mechanicalpower: 1

A main power shaft 54 extends'horizontally across the machineadjacent-the rear and bottom of the main framework lD, said shaft .beingjournaled in the framework l5 and being constantly rotatively drivenwhilethe machine is in use, The driving means for-shaft 54 comprises anelectric motor 55 stationarily' mounted in framework 10, a short'countershaft 56 'journaled in framework Ill, pulleys 5'! and 58'fixedrespectively on the drive shaft-of the motor and on the countershaft, adrive belt 59' connecting the pulleys, and meshing gears 60 and BI fixedrespectively on shafts 56 and 54, the motor being constantly energizedfrom asuitable source of electric current when the machine is in use.

Loose on themain drive shaft 5 is a pinion or gear 62 which isconnective at will with shaft 54 through a single revolution -clutchmechanism to turn withsh aft 54 through one revolution from a normallatched position of said pinion 62. This Single revolution clutchmechanism is adapted to be put into action, or be tripped to couplepinion 62 with shaft 54, through depression'of either one of a pluralityof control keys hereinafter described. I

The driving'element of the clutch is a ratchet wheel 63 fixed to shaft54, and the driven element of the clutch is a'dog 64 normally helddisconnected from the ratchet wheel. Dog 64 islpivoted at 65 to'a disk66 which is loose on shaft 54 and is coaxial with and fixed to thepinion 62. A torsion spring B'I-is connected with the dog and disk toconstantly bias the dog to engagethe teeth of the ratchet wheel fordriving of the pinion 62.

For tripping the clutch for biased driving enagement of the clutchelementsand for disengaging the clutch elements and arrestingth'edriving element and pinion 62 when the latter has rotated 360 degrees,there is provided a clutch tripping and clutch disengaging lever- 65which is rockable about a fixed pivot 69 heldto framework Ill. Thepivot- 69" extends-through a short longitudinal slot ll-'in' lever 58. Aspring is connected with framework It! andthe'upper arm of lever 68 tourgetheleverto and yieldingly hold it in the normal position shown inFigures 1 to 3 andFigures 5 and'6, in which pivot 59 is engaged with thelower end wall of slot H. o

In the normal disengaged condition of the clutch, the dog is held rocked:about its pivot against the force of spring ii'l'into a position inwhich the nose 'of the dog is out of the path 'of travel of :the teethof the ratchet wheel 53',

a lug 64a on the tail of the dog is seated'on' top of a lug 6811 on theupper end of lever '68, and a1stop-lug ii lb 'onzthe dog'is engagedbehind a stop pin 12 projecting laterally from disk 66. The force ofspring 10 is 'sufiicienttoxovercome the force of spring 61; but spring10 is adapted-to stretch momentarily to permit lever 68 to bemomentarily driven downward by dog' 64 at the the dog from the ratchetwheel 63 while the dog is held against rotation by lever 68.

"Reverse-rotation of pinion 62, disk 66 and the clutch dog 64 aboutshaft '54 in the normal disengagedconditionof the clutch is prevented bya U-shaped latch lever 13 journaled on a fixed pivot 14 held toframework l0. One rearwardly extending arm of lever 13 is formed with alaterally extending lug 15 opposed to and constantly urged toward theperiphery of the disk 65 by a spring 16 which is connected to said leverand to the framework [0. The disk is provided with a peripheral notchone side of which affords a cam surface 11' and the other an abruptshoulder 18. The lug 15 of latch lever-13 is normally engaged behind theshoulder 18 to hold the disk against accidental reverse rotation orreverse rotation by the force of the clutch dog spring 61. 'It will beobserved, therefore, that the pinion 62 is normally releasa'bly held ina predetermined angularly rotated position.

The pinion 62 is adapted to drive a rotative but normally stationaryactuator. This actuator consists of a short horizontal shaft 19 which isjournaled in framework l0 and is formed with a single longitudinal andstraight fin or blade 80 which extends substantially the full length ofthe shaft and projects from the shaft a short distance in a planesubstantially tangential to the shaft. The actuator is locatedsubstantially medially of the sides of the machine and is parallelto andlocated slightly above and to the rear of the main drive shaft 54. Apinion BI is fixed on one end of the shaft 19 and meshes with pinion 62,the ratio of the pinions 52 and 8| being such that the actuator isrotatively driven through one-half of one revolution per each singlerevolution of pinion 62.

. As hereinbefore described, the machine shown is provided with a groupof the stops 32 arranged for decimal tabulation, but it-wil1 be obviousthat'a single stop 32 or a number less than 10 may be employed. Inthe'machine shown, ten

, control keys 82 are providedforzstops 32, one

end of each cycle of engagementiof the clutch for each stop, and twoadditional control keys 83 and 84 are provided for the shifter orpositioner 5l'53 which moves the stops 4| carried by the platencarriage. These twelve control keys are arranged in the keyboard of themachine at the rear of the type control keys (not shown) to extend in astraight horizontal row across the machine with keys 83 and 84 atopposite ends of said row of twelve control keys. Depression of any oneof these control keys will, through the means hereinafter described,cause the single revolution clutch to cycle torotate the actuator 1980through one-half of one revolution from a normal position of theactuator, and restoration of the depressed key will cause the clutch tocycle to rotate the actuator through the second half of a revolution,thus restoring the actuator to its normal position. The normal positionof .the actuator with neither of the twelve control keys depressed isthat shown in Figures 1 to 4 and Figures 14 and 17. i r

The actuator 1986 is adapted to actuate the stops 32 and the shifterorpositioner 5l53 for stops 4| selectively through the medium of twelveselectively settable interponents or couplers. Ten interponents 85, onefor each stop 32, are provided, and two additional interponents 86 and81 for the shifter 5l53 are provided in the machine shown. The twelveinterponents are normally out of the path of movement of the actuatorandare arranged for selective positioning thereof'formovement bythe-actuator. Each interponentcomprises twoflat plates rigidly heldtogether in spaced relation by'two shouldered pins 88 and 89, thereduced ends of the pins passing through the plates and being peenedover to lock the plates and pins together, as best shown in Figures 11to 13.

Each interponent 85 is pivoted'to and extends forwardly from the pendentarm of a different one of the levers 35, the pivot pin 88 of theinterponent passing through a pivotal bearing hole in the lever with theside plates of the interponent contacting opposite side faces of thelever to guide the interponent. A light spring 99 is preferablyconnected with each lever 35 and with a lug 9| on the associatedinterponent 85 to urge the forward end of the interponent downward.

The interponents 8E and 8? are DiVOtBL through their pivot pins 98respectively to levers 92 and 93. The levers 92 and 93 are pivoted toframework It by axially aligned pivots 9d. and 94a to rock abouta'common axis which extends horizontally transversely of the machine. Apin 95 is fixed to lever 92 behind this axis and is engaged in alongitudinal slot 96 in an upstanding link 9'1 which is pivoted at itsupper end at 98 to the left hand side arm of the yokelike stop shifterI53. A pin 99 is fixed to lever 99 forward of said axis and is engagedin a closed longitudinal slot IIJIJ in an upstanding link IGI, whichlink is pivoted at its upper end at N12 to the right hand side arm ofthe yoke like stop shifter 5l-53. Levers 92 and 9-3 are in effectbellcrank levers.

The stop shifter 5I--53 is urged to, and yieldingly held in, a normalposition thereof shown in Figures 2, 3, l4 and 17 by a spring I93connected with link HM and. with the forward end of lever 93. A torsionspring H39 is connected with framework I9 and with lug am of interponent86 to urge the forward end of the interponent downward and also to rocklever 92 to normally hold a stop lug 196 on the lever pressed rearwardagainst a limit stop IIlI on framework I9. Lug 9Ia extends leftward fromthe left hand side plate of interponent 86 but is otherwise similar tolugs 9I of the remaining interponents. A torsion spring I99 is engagedwith framework I9 and with the lug 9I of interponent 8? to urge theforward end of this interponent downward and also to rock lever 93 tonormally hold a stop lug I94 on the lever pressed rearward against thelimit stop I91 on framework it. A limit stop M9 on framework It isengageable by lugs III and H2 on the side arms of stop shifter 5I--53 tolimit rocking of the shifter in opposite directions from the normalintermediate position of said shifter. Normally the springs I93, I98 andI99 yieldingly maintain the levers 92 and 93 and the stop shifter in anidle condition in which the pin 99 is located at the closed upper end ofthe slot I99, the pin 95-is located midway between the upper and lowerends of slot 95, and the stop shifter is located in its intermediateinactive position shown in Figures 2, 3, 14 and 1'7.

Each of the twelve control keys (the ten keys 82 and the two keys '83and 85) is a part of a different one of twelve similar operating trains,each of which trains is manually movable by pressure on its key from anormal position to V crank key levers .fulcrumed on a horizontal pivotrod H3 'held to, and extending transversely from, the framework ID. Thetwelve control keys areheld to twelve key levers H4a to H41. The pendentarms of the key levers are bent inwardly toward the foreand aft medialvertical plane of the machine, and links H5 connect the lower ends ofthe key lever arms with the lower ends of theypendentarms of the twelveidentical bellcrank levers I I6.

The levers H6 are fulcrumed on a horizontal pivot rod I" held. to, andextending transversely of, the framework II] slightly forward of shaft.54. Each lever IIB has a rearwardly and upwardly extending arm providedwith an elongate upwardly facing end edge H8 normally located under andengaged by the pin 89 of the interponent to be moved by the lever, saidarm of each lever being loosely engaged between the side plates of theassociated interponent; The key levers are guided in slots in a comb II9 fixed to framework I 9 and normally abut the bottom face of the combforward of the slots as indicated in Figures 1 to 3. Return springs I29for the twelve key operated trains are connected with comb H9 and thekey levers. The levers II 6 are spaced :by and guided in combs I2I andI2Ia'fixed to framework I9.

Depression of either oneof the twelve control keys not only positionsits associated interponent for actuation by the actuator I9-80 but alsoactuates a universal'control'. means for the single revolution clutch,which control means is spring actuated or restored upon return of thedepressed key and causes a complete cycle of operationvof the singlerevolution clutch to take place both when a control key is depressed andwhen the key is released. The universal actuator 19-89 is thus rotatedthrough the first half of a revolution whenever one of the control keysis depressed and completes the revolution whenever the depressed controlkey is released. This control means will now be described.

An upstanding bail I22 is located immediately behind the pendent arms ofthe group of twelve bellcrank levers H6. This bail has its side armspivoted to the main framework In at I23--I23 and is normally urgedforward by a return spring I55 connected with the bail and theframework. The pendent arm of each lever H5 has at the rear thereof afinger I I611 engageable with the crossbar of the bail I22 to rock thebail rearwardly upon depression of the lever actuating control key,fingers IIBa being permanently bendable fore and aft of the machine foradjustment.

A pivot stud I24 fixed to the upper end of the left hand side arm of thebail projects leftward through a clearance slot in an adjacent part offramework III and pivotally supports the forward end of a rearwardlyextending control arm I26 which is movable in response to rocking of thebail I22 and rotation of the disk cam 66 as hereinafter described.Projecting upward from the upper end of control arm I26 near the rearend of the arm is an upstanding lug or projection I2'I coactive with alaterally extendin pin or projection I28 held to clutch lever B8'nearthe lower end of the latter to rock lever 68 in one direction fromclutch disengaging position when a control key is depressed and in theopposite direction from clutch disengaging position when the depressedcontrol key is released. Extending laterally from and pendent from therearend of. arm IZG-is an arcuate lug I29 coactive for safety purposesas hereinafter explained with a pin I30 fixed to the frame.

A light spring I3], of less forcethan latch spring 76, extends downwardfrom a stud I32 on the rear end of the left hand arm of latch I3 to astud I33 ,on control arm'-|26 at the rear of the pivot I24 of arm 126.to normally .hold the upper edge of arm I26 engaged'underpin I28 onclutch lever 68. A push link I34 pivoted at its upper end on stud I32has at its lower end a longitudinal slot I35vin the upper end of whichstud I33 is normally held engaged by spring I3I. Cam edge ll of disk661s adapted to depress the rear end of latch lever I3 far; enough todepress arm I26 about its pivot I24to lower lug I2'I far enough for pinI20 on lever 68 to pass over the top of lug l2'l. The ball is restoredby spring I55 to the normal positionshown in Figures 1, 2, 3, 14 and 17from the key drivenposition of the bail shown in Figures 4, 5, 6, 7, 15,16, 18 and 19. Permanently adjustably' bendable stop lugs I36 and. 53'!are formed on a sheet metal part of the framework I for engagement bystud I24 'to arrest rocking of thebail I22 at its normal and key-drivenlimits of motion.

7 A power actuatedcarriage braking means is provided, saidmeans beingeffective to frictionally retard tabulating movements of the carriageand to frictionally resist rebound of the carriage when atabulatingmovement ,of the carriage is arrested. The carriage brake isapplied automatically whenever: one of the ten control keys for stops 32is depressed, and the brake is automatically released/when the depressedcontrolkeyis released.

.A pair of metallic brake disks I38 are mounted on hub Ia of drum,l5:toturn.with the drum and slide axially of the drum, each of said disks 7being formed with a lug or key I38a engaged in and slidable along akeyway or groove. I39 formed in and extending longitudinally of hubIlia. A rigid or substantially rigid friction-disk I40 of fiber or othersuitable material having a'high coefiicientof friction, is looselymounted on hub I5a between thedisks 138 to permit disk I40 to slideaxially of the drum and to permit the drum to rotate relatively to disk:I40 when the latter is locked against rotation. A spring MI in the formof a resiilient metallic spider bears against the forward one of thedisks I38 and constantly holds the .three disks pressed together withthe rear one of the disks 138 abutted against the drum. The spider iscentered and seated on an annular boss on the adjusting nut I42 which isthreaded on the hub I5a. By adjusting nut I42, the pressure with whichthe three brake disks are held engaged may be varied. A look nut I43threaded on the hub. I5a retains the adjust ment. 1* V The frictionalengagement between the three disks normally causes disk I40 to rotatewith the drum, and power means. are provided to'lock the disk I40against rotation in both directions when-' ever one of the control keysfor stops 32 is depressed and to unlock said disk when the depressed keyis released, said power means normally leaving disk I40 unlocked. Thedisk I40 has a plurality of closely spaced locking notches I40a formedin its periphery, the side walls of each notch being substantiallyparallel or only slightly divergent and extending substantially radially(if-the fdiskil i l 1 T a A locking arm I44 is formed at one end-with'ayoke-lik-portion' I44a pivoted on a' pivot'pin' I45 fixed'tor'frameworkLs aidarm being-formed at its free end with a rearwardlybent, lockinglug I44b arranged to engage edgewise in one of the notches -Ia'5 in.disk ,I40 and corresponding in thickness with the narrower inner; endportion of the notch. Movements of arm I44 lto lock and unlock {disk I40 ,are controlled by a lever I46 having a yoke-like intermediateportion I46a pivoted on pin I and stopflugs, I46b and I46c. Atorsionspring I41, wrapped around pin 45 and engaged with theyoke-likeportion I46a of the lever I46 and with a pin I48 fixed to framework I0,normallyholds the lever I46 rocked to a brake release positionin whichlug I462; is engaged with pin 148' as shown in Figures2and10,

Brake applyingrocklng movement of thelever I46 is arrested by;engagementof lug I46c with pin I48 as shown in Figure 8;. Lever I46 is rocked tobrake applying position by a lug I49 which is formed on and projectsforwardly from the upper end of the link :26 which actuates thebellcrank25 to release and restore the carriage esq lpement. Lug I49 overhangsthe-right hand arm of lever- I46,,and .a pin J50 projects forwardfromthe left hand' arm of said lever and :engages over the locking armI44 between the pivoted and free ends of-the; locking; arm. 'A torsionspring I51, wrapped aroundpin l45 and engaged with the yoke-like-portionI441],v of the locking arm I44, and the yoke -likeportion I46d of leverI46, normally yieldingly holds the arm against pin I50 on the lever andyieldingly constrains the arm to rock withthe lever. If lever I46 shouldbe moved to brake applying :position when no notch M0411 is oppositelug-144b, the lug will ride on the peripheryof the-disk I40: until anotch I 40a arrives oppositelugJMb, "whereupon spring I5I will,forceithe lug into the notch.

The described arrangement, prevents temporary blocking of power movementof link 26 when no notch MM is positioned to receive ,lug- I441) on apower down pull onlink 26.-

V Operation From the foregoing descriptiongof the various parts oftheimproved machine it willbe obvious that the rotative actuatorIiirotatesfrom a normal stationary position 1through the first half of acompleterevolution when any one of the twelve control keys is depressedand. remains stationary until the depressed key is released; and thatthereafter said actuator rotates through the second half of,a;c ompleterevolution when the depressed key is released and remains in itsoriginal and normal position until the same, or

another, control key isldepressed. It will also be obvious that twelveinterponents (teninterponents 85, an interponent 86 and an interponent81) are provided, each associated with a different control keyforipositioning thereofby key depression for actuation thereofby therotative actuator. i V 1 vi V Before describing the power actuation-ofthe key-selected one of ,theinterponent's, a common feature of all ofthe twelve interponents not hereinbefore specifically described will bepointed out. The two side plates of each interponent are re-" cessed atits top from its .free forward end to provide forwardly facingshoulders-I52, and also to provide upwardly facingshoulders or edgesI531 extending forwardly'from the lower ends of shoulders I52 :"to theforwa'r'dfend-s of the inter ponents. At this point, it'.might-.alsobelpointed out that-the fln orzbladefportion'of the actuator need n tnecessarily be disposedtangentially to the shaft portion ofthe actuator.

At the half-step rotated position of the actuator, the upper end of theshoulder I52 of the actuated interponen't (and, preferably, also thelower end of said shoulder) is above a straight line through the axes ofthe actuator and pivot 88 of the interponent. Theshoulders I52 and IE3of the interponent's are so shaped that, in this positioncftheactuatonthe shoulders I52abut thethen rearwardly directed edge of thefin portion of the actuator and curve about the axis of the actuatorconcentrically with said axis so as not to obstruct the' se fcond halfof the revolution of the actuator while still looking the actuatedinterponent against return movement by a togglelike action aslong as theactuator remains in its half-step rotated position. The shoulders I53 ofthe interpone'nts are preferably'so shaped and related to the shouldersI52 that shoulders I53 of the actuated interponent abut fin 8!! of theactuator at the halfs'te'p rotated position of the actuator. Thesefeatures of the interponents and actuator are, 'perhap s, best shown inFigure 12, from which it willalso be noted that the outer edge of fin'80 of the actuator is preferably rounded. V

It will be noted th'at the part or lever to which the actuatedinterponent is pivotedis moved by the actuator and'interponent with anaction similar to that of a crank and a pitman which automaticallyconnect todrive said part or lever, and which stop on dead center, orslightly past dead center, to hold the part or lever against biasedreturn movement until the actuator and interponent are subsequentlydisconnected, the actuator'resembling th'ec'rank and the interponentrsembling thepitman. V

To move a selected oneof the ten stops 32 from inactive to activeposition-arid hold it there, the

associated one of 'the ten keys 82 is depressed and held depressed, andto permit the actively positioned stop to return to its normal inactiveposition the depressed key is released.

When the selected one of the keys 62 is de pressed and held depressed,the following actions take place. The selected one of the teninterponents 85 is rockedupward from the position shown in Figure 3 intoa position for actuation thereof by the actuator 'I9'80,this latterposition corresponding "to the key-setposition of the interponents 86and 81 shown in Figures 18 and in which shoul'denl52 is raised into thepath ofrotat'ion of fin '80 of the actuator. Setting of the interponentby depression of the selected kei 82 causes the interponent settinglever II6 not only to lift the forward end of the selected interponent,but 'alsorock the universal control bail I22 rearwardly from the normalposition thereof shown in Figure '3, thus causing lug I21 on clutchcontrol arm I26 to rock cl'utch disengaging lever 68 to theposition-shown in Figure '4, to permit the clutch elements 63 and 64 toengage under the influence of spring '61. During the initial portion ofthe ensuing single revolution of the driven clutch element and 'of thedisk 66 and pinion 62, cam edge 17 of diskfifimoves'the-clutch latchlever I3 and link I34 downward, thereby rocking the clutch control armI26 downward about its pivot I24 into the position shown in Figure 5, inwhich position, said control arm is held until the disk completes orsubstantially completes one revolution. In this'depressed position ofthe controlfarm' I26, the lug I29thereon isenga'ged behindepin I130toiprevent return-of the bail I22 even though the depressed. control keybereleased before the first single cycle of revolution of the clutch iscompleted. Depression of the control arm,- however, carries lug I21thereon down far enough to permit pin I28 to pass forwardly thereoverand permit clutch disengaging lever 68 to immediately reassume itsnormal position before disk 66 completes its revolution, as shown inFigure 5, sorthat' lever 68 is immediately repositioned'to disengage theclutch at the end of a single revolution of the driven clutch element.When this" revolution is completed, the latch lever 13 will rockupwardly to lock the driven clutch element against reverse rotation, andarm I26 will rock upwardly to position lug I21 behind pin I28 on leve'i"68, as shown in Figure 6. It will be understood that the depressed key82 should beheld depressed until a stop 4| on the carriage has engagedthe activated stop 32. After this stop engagement, with resultant arrestof the tabular travel of the carriage, has occurred, the depressed keyis released, permitting spring I55 to rock the universal bail I22forward to its normal position. This restoration of bail I22 causeslever 66 to be rocked by arm I26 and lug I21 from its normal position toagain free the clutch for a second revolution of its driven element, thelever 68 rocking in a direction opposite to that in which it was rockedby rearward movement of the bail.' If thedepressed key 82 should bereleased prior to arrest of the carriage, the second revolution of theclutch will occur immediately upon completion of the. first revolution,so that the actuator 'I'9'80 will always be in normal position when nocontrol key isdepressed, since it will be noted that lug I29 and pin I30prevent return of the bail to normal positionuntil after the clutch hasfirst completed one revolution so that the clutch will always bereleased once for each depression and once for each release of a controlkey.

The first revolution of the driven element of the clutch rotates theactuator Htthrough one-half of one revolution from its normal posir tionshown in Figures 3 and 4, to that shown in Figuresfi and 7 This halfrevolution of the actuator causes the fol-lowingactions to occur. Theset interponent 85 is movedlto the position shown in Figure 7 and heldlocked in this position until the second revolution of the clutch andsecond half revolution of the actuator take place, whether or not thedepressed keyisreleased prior to the second revolution of the clutch.This movement and locking 'of'the activated i'nterponent '85 rocksthelever 35 connected therewith into the position shown in Figure 7 thusmoving the connected stop32 into its activ'e position and rocking bail28-3t'3l and the connected arm 27 into the position shown'in "Figure 7and locking them there. This movement of the bail and the arm 21actuates (through link 26) the lever 25 to release the escapement and"hold it released to permit the carriage town to the left until-arrestedby engagement of astop 4'I with-the activated stop 32 and also actuates(through-link 26) the lever I46 to apply the carriage brake and hold itapplied by the locking 'of the disk I40 by locking arm 144. Onthesecond: revolution of the-clutch, the actuator makes the secondhalfofa single revolution thereof, thus releasing the activated interponent85, whereupon all the ac'tiv'ated parts re-a'ssume theirrespective-normal positions under the influence of the several springs:hereinbefore described.

' One 1101. more :of i-the stops -4 I carried by the carriage are asusual set in active position and the others are set in inactive positionwithrthe stops releasably held in their respective positions. To changethe setting of any stop 4|, the stop is registered with part 53 of thestop positioner or setter 5 [-53 and the positioner is rocked from itsnormal intermediate position in one direction or the other dependingupon whether the registeredstop is to be moved to active or inactiveposition. Rocking of the positioner from its normal position moves thestop from one of its releasably held positions to the other, andrestoration of the positioner to its normal position leaves the stop inthe releasably held position to which it has been shifted. Depressionand release of control key 84 results in downward rocking of thepositioner from normal position to move the registered stop 4| frominactive to active position and in return of the'positioner to normalposition, while depression and release of key 83 results in upwardrocking of the positioner from normal position to move the registeredstop to inactive position and in return of the positioner to normalposition. 7

Depression of control key 84 actuates its connected one of the twelvelevers H6 to set the interponent 81 for' actuation by the actuator 19-80and-rocks the bail I22 to start a single cycle of'revolution of theclutch, while release of the key 84 permits restoration of the activatedparts to normal, all in the manner described above in connection withpower movement of stop shifting levers 35. The first half revolution ofthe actuator picks up the set interponent 81 as shown in Figure 15 andmoves it to and holds it in the position shown in Figure 16 until, uponrelease of key 84, the clutch makes its second revolution and theactuator makes the second half of its revolution. The first halfrevolution of the actuator moves interponent 81 to rock lever 93 intothe position shown in Figure 16, causing the positioner to be pulleddown by link I8! and actively position the registered stop 4|. Thesecond half revolution of the actuator frees the locked interponent 81and permits spring restoration of the interponent and the parts movedthereby up to and including the stop positioner. The space between lugs50 and 46 of the stops 4| permits return of the positioner withoutmovement of the registered stop. Depression of key 83 actuates itsconnected lever ||6 to set interponent 86 and cycle the clutch toactuate lever 92 to rock the positioner upward from its intermediateposition through link 91 to set a registered stop 4| in inactiveposition as shown in Figure 19, and release of key 83 causes the clutchto make its second cycle for restoration of the actuator to normal andfrees the actuator driven parts for spring return to normal, leaving thestop in inactive position. The slots 95 and Hill in links 91 and |0|permit the described two-directional shift of the stop positioner fromits normal intermediate position.

I claim:

1. A printing machine of the class described having, in combination, anormally stationary actuator which is rotative about a fixed horizontalaxis and which, through only a single small part thereof around saidaxis, is extended eccentrically to said axis to form a single drivingportion, an operation-effecting mechanism which is biased to move out ofthe path of revolution of the actuator into a normal stationary positionand is settable for engagement and driving thereof against its bias bysaid driving portion of the actuator during aninitial half of arevolution of the actuator in one direction out of and back into normalstationary position and for disengagement of said driving portiontherefrom after the actuator'turns through an initial portion of thefinal half of said revolution, an operation-control element for saidactuator and for said operation-eifecting mechanism which is movablefrom a normal stationary position for setting said mechanism and isbiased to return to normal position when released, and power meansresponsive to movement of said control element against its bias to turnthe actuator in said one direction out of its normal position throughthe first half of a revolution and responsive to return movement of saidcontrol element to complete said revolution of the actuator.

2. A printing machine, as claimed in claim 1, having means forautomatically locking the actuator against rotation at the completion ofeach half-revolution of the actuator by the power means, and meansresponsive to each movement of the control element from its normalposition.

and to each biased return movement of said element to release saidlocking means to free the actuator for rotation by the power means.

3. A printing machine, as claimed in claim 1, having severalindividually operable operationeffecting mechanisms of the kind setforth each settable for driving thereof against its bias by the drivingportion of the actuator, and also having a corresponding number ofindividually operable operation-control elements .of the kind set fortheach operable to set a different one of the operation-effectingmechanisms when moved from normal position and to movements .of each ofwhich elements respectively from and to its normal position the powermeans is responsive in the specified manner to rotate the actuator.

4. A printing machine, as claimed in claim 1, wherein the actuator is ashaft which is concentric throughout most of its circumference with thefixed axis of rotation of the actuator and has extending therealong andfixed thereto a single fin-like driving portion which protrudes from theshaft in a single direction and is disposed substantially tangentiallyto the shaft, and wherein there are provided a plurality of saidsettable operation-efiecting mechanisms individually settable fordriving and release thereof by said finlike driving portion, and thereare also provided a corresponding plurality of said operation-controlelements each movable from its normal stationary position to set adifferent one of said mechanisms and to movements of each of whichcontrol elements respectively from and to its normal stationary positionthe power means is responsive in the specified manner to rotate theactuator.

5. Aprinting machine, as claimed in claim 1, wherein theoperation-efiecting mechanism includes a lever which is biased to anormal position and a settable interponent which is pivoted to saidlever and is biased to swing to a normal unset position out of the pathof revolution of the actuator from a set position in which saidinterponent is drivable by the actuator in a direction to thrust saidlever from normal position against its bias, and wherein movement of theoperationcontrol element from normal position against its bias swingsthe interponent relatively to the lever into set position, said leverbeing rockable about a fixed axis parallel to that of the actuator andhaving an arm which is biased to swing toward the actuator and to whichthe interponent is 15 pivoted forup'and down swingingmovement' in aplane to which the actuator axis is normal.

6. A printing machine, as claimed in claim -1, wherein theoperation-effecting mechanism includes a lever which is biased to anormal position and a settable interponent, which interponent ispivoted. to said lever for swinging of the interponent in a verticalplane and is biased to swing to an unset position out of the path ofrevolution of the actuator, and wherein, upon setting of theinterponent, the driving portion of the actuator thrusts the leveragainst its bias through the medium of the interponent during the firsthalf of the ensuing revolution of the actuator and is interposed at theend of said half revolution between the axis of .rotation of theactuator and the pivotal axis of the interponent with said drivingportion in thrust engagement withthe interponent at a point locatedbetween said axes and substantially in a straight line passing throughsaid axes.

7. A printing machine of the class described having,.in combination, anactuator for driving operation-effecting mechanisms of the machine andwhich is mounted for rotation abouta fixed axis and has a singlestraight driving portion which extends longitudinally of said axis andprotrudes farther from said axis than the remainder of the actuator,manually depressible and spring returned operation control keys, poweractuated means responsiveto each said key and controlled respectively bykey depression and key return to first and second halves of a singlerevolution which drives the actuator from and restores it to a normalstationary position, and operationefiecting mechanisms each settable bya different one of said keys to be first driven and then held driventhrough direct engagement therewith of said-driving'portion of saidactuator during the first half of the ensuing revolution of the actuatorandto be released by disengagement therefrom of the driving portion ofthe actuator during the initial portion of the second half of saidrevolution, each said operation-'eirecting mechanism being mounted andbias for free restoration thereof to a normal unset position out of thepath of'revolution of the actuator upon disengagement of the drivingportion of the actuator therefrom.

LAURENCE B. HILL.

REFERENCES CITED 7 The following references are of record in the file ofthis patent: a

UNITED STATES PATENTS Number Name Date 1,345,510 Schluns July 6, 19201,945,895 Hart Feb. 6, 1934 2,059,537 Salzberger et a1 Nov. 3, 19362,099,011 Gabrielson et a1. Nov. 16, 1937 2,157,053 Crumrine May 2, 19392,265, i83 Hill Dec. 9, 1941 2,267,947 Pitrnan Dec. 30, 1941

